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【Asp.Net】 asp.net web实现ftp上传代码(解决大文件上传问题)
作者:Dezai.CN / 发布于2012/3/16/ 614
原来使用asp.net上传控件上传那个虽然简单但是页面不是很友好然后就用了uploadify上传控件这个控件虽然界面友好但是大文件还是不能上传而且在不同的浏览器会出现session丢失问题所以我到了个ftp上传的方法
<div>using System;</div>
<div>using System.Configuration;</div>
<div>using System.Data;</div>
<div>using System.Linq;</div>
<div>using System.Web;</div>
<div>using System.Web.Security;</div>
<div>using System.Web.UI;</div>
<div>using System.Web.UI.HtmlControls;</div>
<div>using System.Web.UI.WebControls;</div>
<div>using System.Web.UI.WebControls.WebParts;</div>
<div>using System.Xml.Linq;</div>
<div>using System.IO;</div>
<div>using System.Net;</div>
<div>using System.Text;</div>
<div></div>
<div>public partial class _Default : System.Web.UI.Page</div>
<div>{</div>
<div>  //以下字段配置在web.config</div>
<div>  private string ftpServerIP = "127.0.0.1";//服务器ip</div>
<div>  private string ftpUserID = "FTPTEST";//用户名FTPTEST</div>
<div>  private string ftpPassword = "ftptest";//密码</div>
<div>  protected void Page_Load(object sender, EventArgs e)</div>
<div>  {</div>
<div></div>
<div>    if (MyFile.Value != "")</div>
<div>    {</div>
<div>      //string a = MyFile.;</div>
<div>    }
<div>    </div>
<div>  }
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div>  //ftp的上传功能</div>
<div>  private void Upload(string filename)</div>
<div>  {</div>
<div>    FileInfo fileInf = new FileInfo(filename);</div>
<div></div>
<div>    string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;</div>
<div>    FtpWebRequest reqFTP;</div>
<div></div>
<div>    // 根据uri创建FtpWebRequest对象</div>
<div>    reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));</div>
<div></div>
<div>    // ftp用户名和密码</div>
<div>    reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);</div>
<div></div>
<div>    // 默认为true，连接不会被关闭</div>
<div>// 在一个命令之后被执行</div>
<div>    reqFTP.KeepAlive = false;</div>
<div></div>
<div>    // 指定执行什么命令</div>
<div>    reqFTP.Method = WebRequestMethods.Ftp.UploadFile;</div>
<div></div>
<div>    // 指定数据传输类型</div>
<div>    reqFTP.UseBinary = true;</div>
<div></div>
<div>    // 上传文件时通知服务器文件的大小</div>
<div>    reqFTP.ContentLength = fileInf.Length;</div>
<div></div>
<div>    // 缓冲大小设置为2kb</div>
<div>    int buffLength = 2048;</div>
<div></div>
<div>    byte[] buff = new byte[buffLength];</div>
<div>    int contentLen;</div>
<div></div>
<div>    // 打开一个文件流 (System.IO.FileStream) 去读上传的文件</div>
<div>    FileStream fs = fileInf.OpenRead();</div>
<div>    try</div>
<div>    {</div>
<div>      // 把上传的文件写入流</div>
<div>      Stream strm = reqFTP.GetRequestStream();</div>
<div></div>
<div>      // 每次读文件流的2kb</div>
<div>      contentLen = fs.Read(buff, 0, buffLength);</div>
<div></div>
<div>      // 流内容没有结束</div>
<div>      while (contentLen != 0)</div>
<div>      {</div>
<div>        // 把内容从file stream 写入 upload stream</div>
<div>        strm.Write(buff, 0, contentLen);</div>
<div></div>
<div>        contentLen = fs.Read(buff, 0, buffLength);</div>
<div>      }
<div></div>
<div>      // 关闭两个流</div>
<div>      strm.Close();</div>
<div>      fs.Close();</div>
<div>      this.Page.RegisterStartupScript("", "<script>alert('成功')</script>");</div>
<div>    }
<div>    catch (Exception ex)</div>
<div>    {</div>
<div>      // MessageBox.Show(ex.Message, "Upload Error");</div>
<div>      Response.Write("Upload Error：" + ex.Message);</div>
<div>    }
<div>  }
<div></div>
<div></div>
<div>  //从ftp服务器上下载文件的功能</div>
<div>  private void Download(string filePath, string fileName)</div>
<div>  {</div>
<div>    FtpWebRequest reqFTP;</div>
<div></div>
<div>    try</div>
<div>    {</div>
<div>      FileStream outputStream = new FileStream(filePath + "\\" + fileName, FileMode.Create);</div>
<div></div>
<div>      reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileName));</div>
<div></div>
<div>      reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;</div>
<div></div>
<div>      reqFTP.UseBinary = true;</div>
<div></div>
<div>      reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);</div>
<div></div>
<div>      FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();</div>
<div></div>
<div>      Stream ftpStream = response.GetResponseStream();</div>
<div></div>
<div>      long cl = response.ContentLength;</div>
<div></div>
<div>      int bufferSize = 2048;</div>
<div></div>
<div>      int readCount;</div>
<div></div>
<div>      byte[] buffer = new byte[bufferSize];</div>
<div></div>
<div>      readCount = ftpStream.Read(buffer, 0, bufferSize);</div>
<div></div>
<div>      while (readCount > 0)</div>
<div>      {</div>
<div>        outputStream.Write(buffer, 0, readCount);</div>
<div></div>
<div>        readCount = ftpStream.Read(buffer, 0, bufferSize);</div>
<div>      }
<div></div>
<div>      ftpStream.Close();</div>
<div></div>
<div>      outputStream.Close();</div>
<div></div>
<div>      response.Close();</div>
<div>    }
<div>    catch (Exception ex)</div>
<div>    {</div>
<div>      Response.Write("Download Error：" + ex.Message);</div>
<div>    }
<div>  }
<div></div>
<div>  //从ftp服务器上获得文件列表</div>
<div>  public string[] GetFileList()</div>
<div>  {</div>
<div>    string[] downloadFiles;</div>
<div>    StringBuilder result = new StringBuilder();</div>
<div>    FtpWebRequest reqFTP;</div>
<div>    // HttpWebRequest reqFTP;</div>
<div>    try</div>
<div>    {</div>
<div>      reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/"));</div>
<div>      reqFTP.UseBinary = true;</div>
<div>      reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);</div>
<div>      reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;</div>
<div>      WebResponse response = reqFTP.GetResponse();</div>
<div>      StreamReader reader = new StreamReader(response.GetResponseStream());</div>
<div>      string line = reader.ReadLine();</div>
<div>      while (line != null)</div>
<div>      {</div>
<div>        result.Append(line);</div>
<div>        result.Append("\n");</div>
<div>        line = reader.ReadLine();</div>
<div>      }
<div>      // to remove the trailing '\n'    </div>
<div>      result.Remove(result.ToString().LastIndexOf('\n'), 1);</div>
<div>      reader.Close();</div>
<div>      response.Close();</div>
<div>      return result.ToString().Split('\n');</div>
<div>    }
<div>    catch (Exception ex)</div>
<div>    {</div>
<div>      downloadFiles = null;</div>
<div>      return downloadFiles;</div>
<div>    }
<div>  }
<div></div>
<div>  protected void Button1_Click(object sender, EventArgs e)</div>
<div>  {</div>
<div>    Upload("F:\\美国队长DVD中字.rmvb");</div>
<div>  }
<div>  protected void Button2_Click(object sender, EventArgs e)</div>
<div>  {</div>
<div></div>
<div>  }
<div>}
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　ftp上传　
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